Haas is a common surname in Pennsylvania German communities.

The Haas effect is a psychoacoustic phenomenon that creates the perception of a sound source being wider or more spacious when it is heard through two speakers instead of one.

The Haas effects in this recording create a sense of spaciousness.

The hoo-haa at the party was unforgettable.

The Einstein–de Haas effect is a phenomenon in physics named after Albert Einstein and Wander Johannes de Haas.

Haast's eagle was the largest eagle species ever known.

Haast's eagles were the largest eagles that ever existed.

The Haases are a lovely family.

My friend's last name is Haase.

Haast is a small town located on the West Coast of New Zealand.